/* nag_dwt_2d (c09eac) Example Program.
 *
 * Copyright 2011, Numerical Algorithms Group.
 *
 * Mark 23, 2011.
 */

#include <string.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagc09.h>
#include <nagx04.h>

int main(void)
{
  /* Scalars */
  Integer         exit_status = 0;
  Integer         i, j, m, n, nf, nwcm, nwcn, nwct, nwl, pda, pdb, pdc;
  /* Arrays */
  char            mode[24], wavnam[20], title[33];
  double          *a = 0, *b = 0, *ca = 0, *cd = 0, *ch = 0, *cv = 0;
  Integer         icomm[(180)];
  /* NAG types */
  Nag_Wavelet     wavnamenum;
  Nag_WaveletMode modenum;
  Nag_MatrixType  matrix = Nag_GeneralMatrix;
  Nag_OrderType   order = Nag_ColMajor;
  Nag_DiagType    diag = Nag_NonUnitDiag;
  NagError        fail;

  INIT_FAIL(fail);

  printf("nag_dwt_2d (c09eac) Example Program Results\n\n");

  /* Skip heading in data file and read problem parameters */
  scanf("%*[^\n] %ld%ld%*[^\n]", &m, &n);
  pda = m;
  pdb = m;
  scanf("%s%s%*[^\n]\n", wavnam, mode);
  if (!(a = NAG_ALLOC((pda)*(n), double)) ||
      !(b = NAG_ALLOC((pdb)*(n), double)))
    {
      printf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }
  printf(" Parameters read from file :: \n");
  printf(" DWT :: Wavelet : %s\n", wavnam);
  printf("        End mode: %s\n", mode);

  /*
   * nag_enum_name_to_value (x04nac).
   * Converts NAG enum member name to value
   */
  wavnamenum = (Nag_Wavelet) nag_enum_name_to_value(wavnam);
  modenum = (Nag_WaveletMode) nag_enum_name_to_value(mode);

  /* Read data array*/
#define A(I, J) a[(J-1)*pda + I-1]
  for (i = 1; i <= m; i++)
    for (j = 1; j <= n; j++) scanf("%lf", &A(i, j));
  scanf("%*[^\n] ");

  printf("\n");
  nag_gen_real_mat_print_comp(order, matrix, diag, m, n, a, pda, "%8.4f",
                              "Input Data     A :", Nag_NoLabels, 0,
                              Nag_NoLabels, 0, 80, 0, 0, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_gen_real_mat_print_comp (x04cbc).\n%s\n",
             fail.message);
      exit_status = 1;
      goto END;
    }
  printf("\n");

  /* nag_wfilt_2d (c09abc).
   * Two-dimensional wavelet filter initialization
   */
  nag_wfilt_2d(wavnamenum, Nag_SingleLevel, modenum, m, n, &nwl, &nf, &nwct,
               &nwcn, icomm, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_nfilt_2d (c09abc).\n%s\n", fail.message);
      exit_status = 2;
      goto END;
    }
  nwcm = nwct/(4 * nwcn);
  if (
    !(ca = NAG_ALLOC((nwcm)*(nwcn), double)) ||
    !(cd = NAG_ALLOC((nwcm)*(nwcn), double)) ||
    !(cv = NAG_ALLOC((nwcm)*(nwcn), double)) ||
    !(ch = NAG_ALLOC((nwcm)*(nwcn), double))
    )
    {
      printf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }

  pdc = nwcm;
  /* nag_dwt_2d(c09eac).
   * Two-dimensional discrete wavelet transform
   */
  nag_dwt_2d(m, n, a, pda, ca, pdc, ch, pdc, cv, pdc, cd, pdc, icomm, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_dwt_2d (c09eac).\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }

  /* Print decomposition */
  strcpy(title, "Approximation coefficients   CA :");
  nag_gen_real_mat_print_comp(order, matrix, diag, nwcm, nwcn, ca, pdc, "%8.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0, 0,
			      &fail);
  printf("\n");
  strcpy(title, "Diagonal coefficients        CD :");
  nag_gen_real_mat_print_comp(order, matrix, diag, nwcm, nwcn, cd, pdc, "%8.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0, 0,
                              &fail);
  printf("\n");
  strcpy(title, "Horizontal coefficients      CH :");
  nag_gen_real_mat_print_comp(order, matrix, diag, nwcm, nwcn, ch, pdc, "%8.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0, 0,
                              &fail);
  printf("\n");
  strcpy(title, "Vertical coefficients        CV :");
  nag_gen_real_mat_print_comp(order, matrix, diag, nwcm, nwcn, cv, pdc, "%8.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0, 0,
                              &fail);
  printf("\n");

  /* nag_idwt_2d (c09ebc).
   * Two-dimensional inverse discrete wavelet transform
   */
  nag_idwt_2d(m, n, ca, pdc, ch, pdc, cv, pdc, cd, pdc, b, pdb, icomm, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_idwt_2d (c09ebc).\n%s\n", fail.message);
      exit_status = 3;
      goto END;
    }

  /* Print reconstruction */
  strcpy(title, "Reconstruction                B :");
  nag_gen_real_mat_print_comp(order, matrix, diag, m, n, b, pdb, "%8.4f", title,
                              Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0, 0,
			      &fail);
 END:
  if (a) NAG_FREE(a);
  if (b) NAG_FREE(b);
  if (ca) NAG_FREE(ca);
  if (cd) NAG_FREE(cd);
  if (ch) NAG_FREE(ch);
  if (cv) NAG_FREE(cv);
  return exit_status;
}